Photoluminescence intensity enhancement in SWNT aqueous suspensions due to reducing agent doping: Influence of adsorbed biopolymer

Kurnosov, N.V. and Leontiev, V.S. and Linnik, A.S. and Литвин, Оксана Степанівна and Karachevtsev, V.A. (2014) Photoluminescence intensity enhancement in SWNT aqueous suspensions due to reducing agent doping: Influence of adsorbed biopolymer Chemical Physics, 438. pp. 23-30. ISSN 0301-0104

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Abstract

The influence of biopolymer wrapped around nanotube on the enhancement of the semiconducting single-walled carbon nanotube (SWNT) photoluminescence (PL) in aqueous suspension which increases due to the reducing agent dithiothreitol (DTT) doping effect was revealed. The greatest enhancement of PL was observed for SWNTs covered with double- or single stranded DNA (above 170%) and DTT weak influence was revealed for SWNTs:polyC suspension ( 45%). The magnitude of the PL enhancement depends also on nanotube chirality and sample aging. The behavior of PL from SWNTs covered with various polymers is explained by the different biopolymers ordering on the nanotube surface. The ordered polymer conformation on the nanotube weakens the reducing agent doping effect. The method of reducing agent doping of nanotube:biopolymer aqueous suspension can serve as a sensitive lumines- cent probe of the biopolymer ordering on the carbon nanotube and can be used to increase the sensitivity of luminescent biosensors.

Item Type: Article
Additional Information: 10.1016/j.chemphys.2014.04.006
Uncontrolled Keywords: Exciton; Luminescence; Quantum yield; Carbon nanotubes; Reducing agent; Nanobiohybrid;
Subjects: Articles in journals > Наукові (входять до інших наукометричних баз, крім перерахованих, мають ISSN, DOI, індекс цитування)
Divisions: Institutes > Institute of Society > Chair of Information Technologies and Mathematics > Chair of Computer Science
Depositing User: Оксана Степанівна Литвин
Date Deposited: 02 Mar 2015 14:01
Last Modified: 16 Apr 2018 11:09
URI: http://elibrary.kubg.edu.ua/id/eprint/6874

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